Parasitic worm infections (helminth infections) can cause a range of symptoms depending on the type of parasite. Common signs include abdominal pain, diarrhea, nausea, vomiting, bloating, fatigue, unexplained weight loss, and itching around the anus. Some people may experience anemia, weakness, or malnutrition due to nutrient loss. In severe cases, worms may appear in stool or cause intestinal blockage. Children may show irritability, poor growth, or sleep disturbances. Proper diagnosis and treatment are essential. Medications such as nizonide wholesale supplies are often used by healthcare providers to manage certain parasitic infections and restore digestive health effectively.